Joes  burkhardt



(No Model.)

J. BURKHARDT.

WIRE SGREEN, &c. No. 878,416. Patented Feb. 21, 1888.

N MM

JOHN nnnnnnnn'r,

OF NEW YORK, N. Y.

WlRE SCREEN, etc.

SPECIPICATIONforming part of Letters Patent No. 378,416, dated February 21, 1888.

Application filed September 19, 1887. Serial No. 250,049.

ToaZZ whom it may concern.-

Be it known that I, JonN BURKI-IARDT, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented a new and useful Method of Construction of Wire Screens; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

In the drawings, Figurelrepresents a trans verse central section of a spheroidal body or globe, through which four holes are shown around its center at equal distances apart. Fig. 2 represents the same with a piece of wire or rod inserted through it at two of the holes therein. Fig. 3 represents a sunken bed or die plate, the concavity of which corresponds in size and shape with one-half of the dimensions of the globe and wire represent-ed in Fig. 2, taken longitudinally thereof. Fig. it represents a central longitudinal vertical section ofthe dieplate shown in Fig. 3, with its counterpart, with the globe and wire shown in Fig. 2 placed between them in position to he acted upon by the operation of the dies, and a tool io'be used with them. 5 rep resents the wire or rod shown in Fig. 2 in the form conferred to it by the action of the tool referred to,rafter it is inserted through the globe and has been removed from the dies; also shows a transverse section of a transverse wire or rod within the globe, occupying th position as in a finished screen.

This invention consistsin a method offorming wire screens and similar articles, and in the production of a screen composed of a series of straight wires or rods. 2. seriesof transverse bent wires or rods, and hollow perforated bodies or covers, each of which includes a single joint or intersection ofa straight and a bent wire at the bend thereof, as herein more fully described;

This improvement is additional to that de scribed in my application filed in the Patent Office and now pending examinatiomas it ohviates the forming of slits or slots, which had to be opened to receive the series of transversewires, which had to pass through the openings within the globular joint-covers.

In the drawings, A denotes the hollow spheroidal joint-cover.

B denotes one of the wires or rods which,

(No model.)

' for the purpose of definiteness of description,

may be termed one of the longitudinal series or kind.

0 denotes a transverse sectional view of one of the wires which may be denominated as of the vertical kind or series.

The rods-B and 0 cross each other within the globular or other shaped cover A, and to allow them to pass across each other within thesmalldimensions ofthejoint-coversA,inthe openings of which they closely fit, and to occupy the same plane in the screen when finished, one of the series of parallel rods or wires is bent laterally, as shown in Fig. 5. The bending is done while they are within their respective joint-covers A and held between the die-plates D E, a hole, a, being formed through the upper plate, 1), through which a suitable blunt tool can be inserted and pass through one of the holes :10 of cover A to receive a stroke of a hammer or the action of a press; and when the rod or wire B and its joint-cover A are removed from the die-plates the cover A is turned on its axis the onefourth of a revolution, whereby the bent portion of the wire is removed from the direct line of passage of the transverse wires or rods 0, that they may pass through the covers A, as shown in Fig. 5.

Having described my improvement in wire screens and similar articles and the method of making the same, I claim- 1. The above-described method of forming wire screens and similar articles, which consists in insertingthelongitudinal wire through a hollow perforated body or joint-cover, then producing a bend of said wire within the interior of said body, and then passing the transverse wire through other perforations of the body and through the bend of thelongitudinal wire therein, as set forth.

2. The wire screen consisting of a series of straight wires or rods and a transverse series of bent wires, in combination with the covers A, each of which includes asinglejoint or intersection of a straight and a bent wire at the bend thereof, substantially as and for the purpose set forth.

September 8, 1887.

JOHN BURKHARDT.

\Vitnesses:

ROBERT BEERLI, GEORGE LENDEL. 

